These are nice kits from Polaris, but I'd ordered it for my 400HO and it doesn't fit even though that model is mentioned in the Polaris info. I've promised the kit to a relative with a Hawkeye, but I can scan the instructions for you if you want.
The instructions are specific to the Hawkeye and 300 engine. On the right side of the 300 engine (recoil starter side), under the boss where the oil filter mounts, there are two plugs in the case. These are where the high pressure hose connections are made. The oil cooler itself mounts on the frame in front of the engine. Overall, it's a pretty tidy looking installation and I'd recommend it for the air cooled 300.
The reason it won't fit on the 400HO is that the two engines are entirely different. The 400HO is liquid cooled and has a dry sump oil system with an external oil tank. The 300 is air cooled and has a wet sump. The 400HO has no high pressure connection plugs on the case for the hoses. And, the intended location for the oil cooler itself is already occupied by the radiator for the cooling system. As I said, there's no mention of the 400HO in the instructions and looking at the two engines the differences are obvious. So, I don't know what Polaris was thinking when they said this kit would fit both models except that they're built on the same chassis and someone in marketing must have thought it should.
Edit: If you want the instructions, PM me and I'll get them to you.
MarkC - Spokane, WA USA
"Long live the orphaned Hawkeyes and mid-size Sportsmans"
Last edited by 1of7627; 03-24-2011 at 10:05 AM.
Reason: Note on instructions.